feat: add bell notification system for task assignment

migrations/0066_redesign-notification-table.up.sql

@@ -16,3 +16,5 @@ CREATE TABLE notification_notified (
   read boolean NOT NULL DEFAULT false,
   read_at timestamptz
 );
+
+CREATE INDEX idx_notification_pagination ON notification (created_on, notification_id);

migrations/0067_add-user_account_settings.up.sql

@@ -10,7 +10,7 @@ CREATE TABLE account_setting (
   data_type text NOT NULL REFERENCES account_setting_data_type(data_type_id) ON DELETE CASCADE,
   constrained_default_value text
     REFERENCES account_setting_allowed_values(allowed_value_id) ON DELETE CASCADE,
-  unconstrained_default_value text,
+  unconstrained_default_value text
 );
 
 INSERT INTO account_setting VALUES ('email_notification_frequency', true, 'string');
@@ -25,7 +25,7 @@ INSERT INTO account_setting_allowed_values (setting_id, item_value) VALUES (0, '
 INSERT INTO account_setting_allowed_values (setting_id, item_value) VALUES (0, 'hourly');
 INSERT INTO account_setting_allowed_values (setting_id, item_value) VALUES (0, 'instant');
 
-CREATE TABLE account_setting (
+CREATE TABLE account_setting_value (
   account_setting_id uuid PRIMARY KEY DEFAULT uuid_generate_v4(),
   user_id uuid NOT NULL REFERENCES user_account(user_id) ON DELETE CASCADE,
   setting_id  int NOT NULL REFERENCES account_setting(account_setting_id) ON DELETE CASCADE,

migrations/0068_add-task_watcher-table.up.sql

@@ -0,0 +1,6 @@
+CREATE TABLE task_watcher (
+  task_watcher_id uuid PRIMARY KEY DEFAULT uuid_generate_v4(),
+  task_id uuid NOT NULL REFERENCES task(task_id) ON DELETE CASCADE,
+  user_id uuid NOT NULL REFERENCES user_account(user_id) ON DELETE CASCADE,
+  watched_at timestamptz NOT NULL
+);